Motor
A motor includes: a base having a shaft tube with a first opening and a second opening at two opposite ends respectively, with a bearing received in the shaft tube; a stator coupled with the base; a rotor having a shaft and a hub, the shaft extending through the first opening and coupling with the bearing, the hub coupling with the shaft and having a through hole for a positioning tool to insert, and the hub further having a permanent magnet, with a gap formed between the permanent magnet and the stator; and a bottom lid coupling with the shaft tube and covering the second opening.
1. Field of the Invention
The present invention generally relates to a motor and, more particularly, to a motor can be easily assembled.
2. Description of the Related Art
Referring to
Conventionally, there is usually a bottom lid 94 mounted to the shaft tube 911 to block the bottom opening 913, so as to achieve specific functions such as anti-dust and oil-preservation. The bottom lid 94 is usually positioned at the bottom opening 913 by engaging with or tightly fitting with the shaft tube 911. Furthermore, in order to ensure that the bottom lid 94 can be smoothly mounted into the bottom opening 913 in assembly, a fixture for abutting a top surface of the hub 932 of the rotor 93 is used for axially position the motor 9, and thus a worker can press the bottom lid 94 into the bottom opening 913 of the shaft tube 911 in a direction form the bottom opening 913 toward the top opening 912.
However, the rotor 93 may keep rotating when the worker attempts to axially position the motor 9 since the hub 932 rotatably coupling with the bearing 914 via the shaft 931 is rotatable relative to the base 91. Even though the limiting washer 933 is used, it can only limit the axial movement of the rotor 93, not the rotation of the rotor 93. Therefore, the rotation of the rotor 93 during assembly of the motor 9 may cause problems such as the shift in position of the abutted fixture due to the rotated hub 932 and thus lead to inconvenience of assembly, lower the quality of the motor 9, and unstable performance.
SUMMARY OF THE INVENTIONWhat is needed is a motor unnecessary to be assembled via a tool positioning the hub of this motor during assembly thereof, so as to be manufactured smoothly, conveniently and fast.
In one implementation, a motor includes: a base having a shaft tube with a first opening and a second opening at two opposite ends respectively, with a bearing received in the shaft tube; a stator coupled with the base; a rotor having a shaft and a hub, the shaft extending through the first opening and coupling with the bearing, the hub coupling with the shaft and having a through hole for a positioning tool to insert, and the hub further having a permanent magnet, with a gap formed between the permanent magnet and the stator; and a bottom lid coupling with the shaft tube and covering the second opening.
In this implementation, one or more of the following features may be included that: the through hole axially aligns with an edge of the shaft tube, with the edge defining the first opening; the through hole axially aligns with the stator; the stator has a silicon steel member, a insulating member, and a coil, with the insulating member coupling with the silicon steel member, the coil winding around an outer periphery of the insulating member, the coil electrically connecting with a driving circuit, and the through hole of the hub aligning with the insulating member of the stator; the stator has a silicon. steel member, a insulating member, and a coil, with. the insulating member having a first bobbin and a second bobbin coupling to two opposite ends of the silicon steel member respectively, the coil winding around an outer periphery of the insulating member, the coil electrically connecting with a driving circuit, and the through hole of the hub aligning with the first bobbin of the stator; the stator has a silicon steel member, a insulating member, and a coil, with the insulating member coupling with the silicon steel member, the coil winding around an outer periphery of the insulating member, the coil electrically connecting with a driving circuit, and the through hole of the hub aligning with the silicon steel member of the stator; a cover couples with the hub and seals the through hole; the cover is a rubber cover, a plastic cover, or a sticker; the cover has a pin extending into and engage inside the through hole; the hub has an indent part receiving the cover; a top of the cover aligns with a top of the hub; a top of the cover is lower than a top of the hub; the shaft tube receives an anti-disengaging member coupling with the rotor; the anti-disengaging member is a limiting washer or a thrust plate; the shaft tube receives a pressing member pressing and positioning the bearing; there is a layer of diamond like carbon formed on surfaces of the shaft; the shaft tube is made of metal; the base has a plate detachably connecting with the shaft tube, with a connecting sleeve arranged between the shaft tube and the plate; a sealing member is disposed between the shaft tube and the bottom lid; a first shoulder portion is formed on an inner periphery of the shaft tube, a second shoulder portion is formed on an outer periphery of the bottom lid, the first shoulder portion is opposite to the second shoulder portion, and the sealing member is disposed between the first and second shoulder portions; and the sealing member is sandwiched by the first and second shoulder portions.
The present invention will become more fully understood from the detailed description given hereinafter and the accompanying drawings which are given by way of illustration only, and thus are not limitative of the present invention, including:
In the various figures of the drawings, the same numerals designate the same or similar parts. Furthermore, when the term “first,” “second,” “top,” “bottom,” and similar terms are used hereinafter, it should be understood that these terms refer only to the structure shown in the drawings as it would appear to a person viewing the drawings, and are utilized only to facilitate describing the invention.
DETAILED DESCRIPTION OF THE INVENTIONReferring to
The base 1 includes a shaft tube 11 having a first opening 111 and a second opening 112 respectively at two opposite ends thereof. In this embodiment, the base 1 further includes a plate 12 that connects with the shaft tube 11 integrally or detachably, wherein an integral connection of the shaft tube 11 and plate 12 as shown in
The stator 2 may be coupled with the base 1 at the shaft tube 11 or the plate 12. In this embodiment, the stator 2 is arranged around the shaft tube 11 and abuts against the periphery of the shaft tube 11. The stator 2 includes a silicon steel member 21, a first bobbin 22, a second bobbin 23 and a coil 24. The silicon steel member 21 can be in the form of a pile of silicon steel plates or a single silicon steel plate. The first bobbin 22 and second bobbin 23 may be integrally connected as a one-piece insulating member formed by injection molding, and respectively couple to two opposite ends of the silicon steel member 21. The coil 24 winds around an outer periphery of the insulating member. Furthermore, the stator may further include a driving circuit 25 settled on the base 1 as shown in
The rotor 3 includes a shaft 31 and a hub 32. The shaft 31 extends through the first opening 111 of the shaft tube 11 and couples with the bearing 13 by an end. Preferably, there is a layer of diamond like carbon (DLC) formed on the surfaces of the shaft 31, so as to improve the abradability of the shaft 31. The hub 32 couples with the other end of the shaft 31, and the hub 32 has a through hole 321 for a positioning tool to insert and engage during assembly, with the through hole 321 axially misaligned with the shaft 31. Preferably, the through hole 321 axially aligns with an edge of the shaft tube 11 defining the first opening 111 as shown in
The bottom lid 4 is mounted on the shaft tube 11 and covers the second opening 112. The bottom lid 4 may couple with the shaft tube 11 by tight fitting or engagement.
Referring to
Referring
Now, please refer to
Although the invention has been described in detail with reference to its presently preferable embodiments, it will be understood by one of ordinary skill in the art that various modifications can be made without departing from the spirit and the scope of the invention, as set forth in the appended claims.
Claims
1. A motor, comprising:
- a base having a shaft tube with a first opening and a second opening at two opposite ends respectively, with a bearing received in the shaft tube;
- a stator coupled with the base;
- a rotor having a shaft and a hub, the shaft extending through the first opening and coupling with the bearing, the hub coupling with the shaft and having a through hole for a positioning tool to insert, and the hub further having a permanent magnet, with a gap formed between the permanent magnet and the stator; and
- a bottom lid coupling with the shaft tube and covering the second opening.
2. The motor as claimed in claim 1, wherein the through hole axially aligns with an edge of the shaft tube, with the edge defining the first opening.
3. The motor as claimed in claim 1, wherein the through hole axially aligns with the stator.
4. The motor as claimed in claim 3, wherein the stator has a silicon steel member, a insulating member, and a coil, with the insulating member coupling with the silicon steel member, the coil winding around an outer periphery of the insulating member, the coil electrically connecting with a driving circuit, and the through hole of the hub aligning with the insulating member of the stator.
5. The motor as claimed in claim 3, wherein the stator has a silicon steel member, a insulating member, and a coil, with the insulating member having a first bobbin and a second bobbin coupling to two opposite ends of the silicon steel member respectively, the coil winding around an outer periphery of the insulating member, the coil electrically connecting with a driving circuit, and the through hole of the hub aligning with the first bobbin of the stator.
6. The motor as claimed in claim 3, wherein the stator has a silicon steel member, a insulating member, and a coil, with the insulating member coupling with the silicon steel member, the coil winding around an outer periphery of the insulating member, the coil electrically connecting with a driving circuit, and the through hole of the hub aligning with the silicon steel member of the stator.
7. The motor as claimed in claim 1, wherein a cover couples with the hub and seals the through hole.
8. The motor as claimed in claim 7, wherein the cover is a rubber cover, a plastic cover, or a sticker.
9. The motor as claimed in claim 7, wherein the cover has a pin extending into and engage inside the through hole.
10. The motor as claimed in claim 7, wherein the hub has an indent part receiving the cover.
11. The motor as claimed in claim 7, wherein a top of the cover aligns with a top of the hub.
12. The motor as claimed in claim 7, wherein a top of the cover is lower than a top of the hub.
13. The motor as claimed in claim 1, wherein the shaft tube receives an anti-disengaging member coupling with the rotor.
14. The motor as claimed in claim 13, wherein the anti-disengaging member is a limiting washer or a thrust plate.
15. The motor as claimed in claim 1, wherein the shaft tube receives a pressing member pressing and positioning the bearing.
16. The motor as claimed in claim 1, wherein there is a layer of diamond like carbon formed on surfaces of the shaft.
17. The motor as claimed in claim 1, wherein the shaft tube is made of metal.
18. The motor as claimed in claim 1, wherein the base has a plate detachably connecting with the shaft tube, with a connecting sleeve arranged between the shaft tube and the plate.
19. The motor as claimed in claim 1, wherein a sealing member is disposed between the shaft tube and the bottom lid.
20. The motor as claimed in claim 19, wherein a first shoulder portion is formed on an inner periphery of the shaft tube, a second shoulder portion is formed on an outer periphery of the bottom lid, the first shoulder portion is opposite to the second shoulder portion, and the sealing member is disposed between the first and second shoulder portions.
21. The motor as claimed in claim 20, wherein the sealing member is sandwiched by the first and second shoulder portions.
Type: Application
Filed: Feb 26, 2015
Publication Date: Oct 8, 2015
Inventors: Alex Horng (Kaohsiung City), Yeh-Feng Chen (Kaohsiung City), Wen-Te Chang Chien (Kaohsiung City)
Application Number: 14/631,902